I tried to make sendmail working in a very basic system. To make simple, I intend to start with using the smtp of my isp (club-internet.fr) which is working well.
The log says something is unavailable, but I do not see which service or else is missing ?
Nov 25 11:05:41 mymachine sendmail: gAPA5Z103001:
firstname.lastname@example.org, ctladdr=root (0/0), delay=00:00:06,
xdelay=00:00:06, mailer=esmtp, pri=30280, relay=mydomain.com. [18.104.22.168],
dsn=5.0.0, stat=Service unavailable
Thanks for helping a